Screw-driver.



J. H. SHAW.

SCREW DRIVER.

APPLICATION FILED DEC. 21, 1910.

Patented Dec. 16, 1913.

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UNITED ETATES PATEN @FFTDE.

JOHN H. SHAW, OF NEW HAVEN, CONNECTICUT, ASSIGNOR TO SARGENT & COMPANY, OF NEW HAVEN, CONNECTICUT, A CORPORATIUN OF CONNECTICUT.

SCREW-DRIVER.

Specification of Letters Patent.

Patented Dec. 16,1l9i3.

Application filed December 21, 1910. Serial No. 598,595.

To all whom it may concern Be it known that I, JOHN H. SHAW, of the city and county of New Haven and State of Connecticut, have invented new and useful Improvements in Screw-Drivers, of which the following is a full, clear, and exact description when taken in connection with the accompanying drawings, which form a part thereof.

This invention relates to screw drivers, and has for its object the production of a screw driver, the parts of which are readily assembled, and which when finished will be an effective tool, and more particularly the invention consists in the method of securing the blade to the handle, which is formed partly of metal and partly of wood, so that rotary and longitudinal force exerted on the handle will be communicated directly to the blade without injury to the wooden or gripping portion of the handle.

The invention further consists in the several improvements and combinations of parts set forth and claimed hereinafter.

Referring to the drawings, Figure 1 represents a side elevation of a screw driver embodying the invention, Figs. 2 and 3 represent top and side views, respectively, of the metal portion of the handle before the parts are assembled, Figs. 4 and 5 represent side and top views, respectively of the unassembled blade, Fig. 6 represents a side view of the blade and metal portion of the handle assembled, Fig. 7 represents a side view of the metal and wooden portion of the handle assembled before the wooden portion has been reduced to the desired form, and Fig. 8 represents a longitudinal vertical section through one end of the metal portion of the handle.

In all figures, similar letters of reference represent like parts.

Referring to the drawings the letter A. designates the shank of the blade of a screw driver, and B the reduced end for engaging the desired article.

C designates two corresponding wooden portions adapted to fit on either side of a metal portion or base D of the handle to form the grip. The part D is formed of metal, and consists of a flat central web E, with a rounded end F, and a forward hollow ferrule portion G, the extreme end of which is slightly flared, as shown at H. Within the flat portion E extending from the tubular portion G is a slot I sufficiently large for the reception of the shank of the blade A. Extending over the slot 1 are two bridge portions J, with corresponding rivet holes K. Screw holes L are also shown in the body portion E. At the rear end of the shank A of the blade transverse recesses M are out on opposite sides of the shank, leaving a head N, and at a distance from the end is an annular slot 0 inclined in the direction away from the end B.

The parts are assembled as follows: The rear end of the shank A is inserted in the tubular portion G of the metal frame D of the handle until the end N reaches the limit of the slot 1. W hen in this position, the bridges J are opposite the grooves M in the shank A of the blade. A rivet Q is passed through the rivet holes K in the bridge and the corresponding rivet hole P in the shank A, and the bridges J being formed of malleable iron are set into the grooves M in the shank A which secures the metal portion of the handle D to the blade in such manner that the two will necessarily rotate together. The flared end H of the tubular portion G is then set down into the annular recess 0 and against the rear face of the shoulder formed thereby so that any blow upon the rear end F of the metal portion of the handle D will be communicated through the end portion of the shank A, and through the portion H of the tubular portion G, bearing on the shank in the slot 0. When the two metal portions have thus been assembled, the wooden portions C are placed on either side of the flat metal portion E, and are secured thereto by screws, through the perforations L. The wooden portions are then turned down to the desired form for the grip of the screw driver.

Having now described my invention, what I claim and desire to secure by Letters Patent, is:

1. A screw driver, comprising a metal frame, having a flat web with a slot therein, and a hollow ferrule portion in communication with said slot, a metal bridge extending across said slot, and a blade having a shank extending into said ferrule portion and said slot, and provided with a groove engaging said brid e; substantially as described.

2. A screw driver, comprising a metal frame having a hollow ferrule portion at one end and a flat central web with a slot extending to said ferrule portion, a pair of oppositely located bridges extending across said slot, a blade having a shank extending into said ferrule portion and slot and provided With a groove engaged by said bridges, and grip portions secured to said frame at opposite sides; substantially as described.

In Witness whereof, I have hereunto set my hand on the 13th day of December, 1910;

JOHN H. SHAW.

Witnesses:

W. D. BAKER, BERTHA RAY.

Copies of this patent may be obtained. for five cents each, by addressing the Commissioner of Patents. Washington, D. G. 

